耦合相图计算的凝固过程显微偏析形成数值模拟  

The Simulation of the Forming of Microsegregaiton During Solidification Process in the Calculation of Coupling Phase Diagrams

作　　者：刘永刚[1] 陈光[1] 孙瑜[2] 孙国雄[2] 

机构地区：[1]南京理工大学材料科学与工程系,江苏南京210094 [2]东南大学机械系,江苏南京210096

出　　处：《应用科学学报》2004年第4期523-527,共5页Journal of Applied Sciences

基　　金：国家自然科学基金资助项目(59974011)

摘　　要：建立了耦合热力学相图计算的显微偏析宏、微观模型并论述了其主要数值方法,以水冷铜型内冷却的Al-4.5%Cu合金铸锭为例仿真了其凝固过程中显微偏析的形成,并与试验结果进行了对照,获得了与试验结果吻合较好的模拟结果,验证了模型和算法的正确性.Macro- and micro- models of microsegregation simulation are suggested and the primary numerical methods are discussed at the same time. As an example, microsegregation simulation of Al-4.5%Cu binary alloy in water-cooled Cu mould is also presented. The comparison of simulation results and experiments indicates that these two results were in complete agreement. This verifies the validity and the applicability of the models and the numerical methods.

关 键 词：显微偏析 凝固过程 相图计算 水冷 合金 铸锭 冷却 吻合 对照 试验结果 

分 类 号：TG113[金属学及工艺—物理冶金] TG111.4[金属学及工艺—金属学]